Grease gun



Oct. 1.9 1926.

J. w. ELLISk GREASE GUN Filed June 9, 1924 MWL D. Lm H W m u m m @q D@ N m .Om

Wmwiml MHWHIIIIIII. I Eni.. mlllillll, K y u@ nary so called oiler 8 which is externally threaded to engage internal threads in the bore or duct 9a of the object 9 to be oiled; such oiler has an angular flange 8a on its outer end projecting slightly beyond the object 9; and said flange is adapted to be engaged by a bayonet shaped flange or slot 2 on the outer end of head 2, so that the part 2a can be readily engaged with the part 8a as shown in Figures l and 2, and when so engaged can not be pulled axially away therefrom, nor rotated relative thereto while engaged therewith. The oiler 8 has an axial bore having a shoulder 8b at its outer end and a pin 8c at its inner end; and within the oiler is fitted ak closing cap 8d which is nor-- mally pressed outward by a spring 8e interposed between the cap and the pin 8-, so that normally the cap is seated against the flange 8s and prevents escape of oil from the duct 9? and entrance of dust therein. The said capl can be pushed inward by the nozzle of an oil can when it is desired to supply oil to the duct 9a. As the oiler shown is a well known form of oiler, further description thereof is unnecessary.

The nozzle 6?* is adapted to be vprojected beyond the outer end of the outlet head 2 when the gun is in use, so that the part 6a may be entered into the oiler 8 as indicated in 'Figure 2, displacing the cap 8d, therein, and allowing the oil or grease to enter the duct 9?: The extremity of the nozzle 6a may be provided with lateral apertures or recesses 6, through which the oil can escape into the oiler 8, and through the latter into the duet` 9 of the object to be lubricated.

Preferably a washer (Seis placed on the nozzle 6a and abuts against the part 6. This washer is adapted to form a practically grease tight joint between the outer end of the oiler and the disk or member 6 when the gun is in use, as indicated in Figure 2. A washer t@ may be placed in the bore' of the inlethead et, and contacted by the closed end 7b of the tube 7 when the latter is retracted, as indicated in Figure l, when the gun is not in use.

The tube 7 may be shifted longit-udinally, by any suitable means, to the retracted closed position indicated in Figure l or to the projected operative position indicated in Figure 2. Preferably I provide the sleeve 5 with a cam slot 5 which is engaged by the projecting end of the in 7s. The cam slot 5f is of such pitch and length that by properly turning the sleeve the interengagement of the pin 7 with slot 5r will move the tube 7 to the closed position indicated in Figure 1; in which position the head 7b of the tube -abuts against the washer .fl-e and forms la close joint' therewith, so that. no grease can escape. In this retracted position of the tube the nozzle 6a 1s retracted within head 2. By turning thesleeve 5 in -a reverse direction, the tube 7 can be moved to the operative position indicated in Figure Q; in which position (assuming that the head 2 has been previously interlocked with the oiler 8 as indicated in Figures l and 2) the nozzle 6 will enter the oiler (forcing bach the cap 8d and compressing spring 80) and permit grease under pressure to flow from the supply pipe 10 through the tube T and nozzle 6a into the duct 9 of the part to be lubricated. The sleeve 5 is preferably polygonal to facilitate turning thereof, but may be of any desired contour.

From the foregoing it will be seen that when it is desired to use the gun, the head 2 is engaged with the oiler while the tube 7 is in retracted position (Fig. l) then the tube i' is projected, as indicated in Figure 2, and grease will fiow from the supply pipe l0 through the gun into the object to be lubricated. Vihen'the head 2 is engaged with the oiler, the tube 7 can be readily moved to cause the nozzle 6FL to displace cap 8d in the oiler by simply turning the sleeve', the cam slot 5agreatly augmenting the power applied to the sleeve.

The ends of the cam slot 5L are preferably deflected at such an angle to the axis of the sleeve that the pin Y@ will effectively loch or hold the tube 7 in either its retracted or projected position. When the tube 7 is retracted as in Figure l, it is tightly closed and no grease will be lost. Then the gun is in operation loss of lubricant is prevented by the close joint formed by the washer t5e between the part 6 and the oiler 8.

Oil may be supplied to pipe l0 by any suitable means not shown, orming no par( of the present invention, such as a force pump or other supply of grease under pressure. then the grease gun is closed as shown in Figure 1, no grease can flow therefrom even if part l0 is connected to a grease supply under pressure, because the tube 'T is held in retracted position against the washer le by the end of cam slot 5a engaging pin 7 (as shown in Fig. l) which holds the tube securely until the sleeve is turned. By simply turning the sleeve 5 the tube can be moved to the left, whereupon the grease permitted to flow, and grease will continue to flow through and from the gun until thev reservoir 9. is filled, or the supply is cut ott by retracting tube 7, by turning sleeve to the position shown in Fig, l. With this gun the operator does not have to hold the gun either when it is in open or closed position, if the gun is properly engaged with the oiler.

`When the gun is in use and grease is 'lieu'- ing therethrough, the parts are in the positien indicated in Figure 2, and there is a tendency of the grease to pass backw around the tube i' and into the barrel l n., up thi-ough the slot l@ to the sleeve part To prevent such leakage, a washer l (see :i gun connected by screw threads, I do not intend to limit myself to the use of seien' threads, as such parts may be fastened together in any preferred suitable manner.

To enable the gun to be used with some forms of equipment or machines already in service the screw 2S may be loosened and the outlet head 2 moved back until the nozzle G is uncovered, and then the screw may be set. Then the nozzle can be inserted directly into the inlet of the chamber or object to which oil is to be supplied, While the gun is held by hand; Without any interlocking between the part 2 and the object to which the grease is supplied. By the word grease I mean to include any kind of fluid or semi-fluid lubricant.

I claim:

I. A grease gun connection comprising a casing adapted to be connected at one end with a grease supply under pressure and having` a nozzle at its other end adapted to be entered into the inlet of the object to be lubricated; a longitudinally movable member Within the casing connected at one end to the nozzle; and manually operable means for longitudinally moving the member in the casing to retract the nozzle, said member being adapted when in one position to close the grease passage, and When in another po sition to project the nozzle and open the grease passage.

In a grease gun connection as set forth in claim l, the means for moving the member comprising a pin connected With the member, and a rotatable sleeve mounted on the casing and having a cam slot engaging said pin.

3. A grease gun connection comprising a casing having a barrel; an inlet head at one end; and an outlet head at its other end; a longitudinally movable member Within the casing and extending adjacent the inlet head and into the outlet head; manually operable means for moving said member said member beingl adapted in one position to close the inlet head to prevent the admission of grease and in another position to open the inlet head to permit the admission of grease; and a nozzle within the outlet head adapted to be entered into the grease inlet of the member to be lubricated.

4. In a grease gun connection as set forth in claim 3, the means for moving the member comprising a pin connected with the member, and a rotatable sleeve mounted on the' casing having a cam slot engaging said pin, substantially as described.

5. A. grease gun connection comprising a casing having a barrel; an inlet head at one end thereof adapted to be connected to a supply of grease; and an outlet head at the other end of said barrel adapted to be detachably engaged With the grease inlet of the object to be lubricated; a longitudinally movable tube Within the casing eX- tended through the barrel adjacent the inlet head and into the outlet head and ad apted in one position to close the inlet head and prevent the admission of grease, and

in another position to open the inlet head to permit the admission of grease, and manually operable means for moving said tube, substantially as described.

6. In a grease gun connection as set forth in claim 5, the means for moving the tube comprising a pin connected with the member, and a rotatable sleeve mounted on the casing having a cam slot engaging said pin.

7. A grease gun connection comprising a casing having a barrel; an inlet head atone end thereof adapted to be connected to a suply of grease; and an outlet head at the other end of said barrel adapted to be de tachably engaged with an oiler or closure at the grease inlet of the object to be lubricated; a longitudinally movable tube Within the casing extended through the barrel adjacent the inlet head, and into the outlet head and manually operable means for moving the tube, said tube being adapted 171 in one position to close the inlet head to prevent the admission of grease and in another position to open the inlet head to per mit the admission of grease.

8. In a grease gun connection as set forth in claim 7, the means for moving the tube comprising a pin connected with the tube, and a rotatable sleeve mounted on the casing having a cam slot engaging said pin.

9. A grease gun connection comprising a casing having a barrel; an inlet head at one end thereof; an outlet head at the other end of said barrel; a longitudinally movable tube Within the casing extended through the barrel adjacent the inlet head, and adapted in one position to close the inlet head to prevent the admission of grease and in another position to open the inlet head to permit the admission of grease; manually operable means for adjusting said tube; an outlet head; a member slidably mounted Within the outlet head and connected with said, tube; and a nozzle connected with the said member adapted to be entered into the grease inlet of the part to be lubricated.

10. In a grease gun connection as `set forth in claim 9, the means for adjusting the tube comprising a pin connected With the tube, and a rotatable sleeve mounted on the casing having a cam slot engaging said pin.

il. A grease gun connection comprising a casing having a barrel; an inlet head at one end thereof adapted to be connected to lili) a supply of grease under pressure; an outlet head at V,the other end'of said barrel adapted to be detachably engaged vWith an oiler or Closure at the grease inlet of the part to be lubricated; a longitudinally movable tube Within the casing extended through the barrel adjacent the inlet head and into the outlet head, and adapted in one position to close the inlet head to prevent the admission of grease and in another position to open the inlet head to permit the admission of grease; a disk slidably mounted Within the outlet head and oon- Leoese neeted with said tube; and a nozzle on the said disk Within the outlet head and adapted to be entered into thegrease inlet of the part to be lubricated.

'12. In a grease gun connection as forth in olaim l1, means for adjusting the tube comprising a pin connected with the tube; and a rotatable sleeve mounted on the Casing having a Cam slot engaging said pin.

In testimony that I` claim the foregoing as my ownl atlix my signature.

JOHN W7. ELLS.

seti i 

